Severing mechanism for tube-making machines.



Patented 0012.17, 1911.

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IIIIUII APPLICATION FILED MAILZQ, 1910.

F. CLOSBORN. SEVERING MECHANISM FOR TUBE MAKING MACHINES. APPLICATION FILED MAR. 29, 1910.

1,006,399- Patented Oct. 17,1911.

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SEVERING MECHANISM FOR TUBE MAKING MACHINES. APPLICATION FILED MAILZSJ, 1910.

1,006,399, 1 Patented Oct. 17,1911.

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F. O. OSBORN.

SEVBRING MECHANISM FOR TUBE MAKING MACHINES.

APPLICATION FILED MAR. 29, 1910.

Patented Oct. 17, 1911.

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F. c. OSBORN. SEVERING MECHANISM FOR TUBE MAKING MACHINES.

APPLICATION FILED MAR. 29, 1910.

Patented Oct. 17, 1911.

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APPLICATION FILED MAR. 29, 1910.

Patented Oct. 17,1911.

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attomg COLUMBIA PLANOURAPH CO-IWASHINGTON, D. C.

UNITED STATES FATEN T OFFICE.

FRANCIS G. OSBORN, OF DETROIT, MICHIGAN, ASSIGNOR TO SING-LE SERVICE PACKAGE CORPORATION OF AMERICA. OF NEW YORK, N. Y.', A CORPORATION OF NEW JERSEY.

SEVERING MECHANISM FOR TUBE-MAKING MACHINES,

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To all whom it may concern:

Be it known that I, FnANoIs G. OSBORN, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Severing Mechanism for Tube-Making Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that type of machines by which continuous strips or bands of paper, or other material are coiled spirally around a mandrel, cemented together, formed into continuous tubes and finally cut off into predetermined lengths.

The objects of this invention are to improve the tube severing mechanism of machines of the type disclosed and claimed in my copending application No. 504,915 filed June 28, 1909, entitled machine for making spirally wound tubes of which this is a division; and to these ends the invention consists in the novel details of construction and COlI1- binations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals refer to like parts in all the views :Figure 1, is a plan view of the machine; Fig. 2, a sectional elevation thereof on the line 22 of Fig. 1; Fig. 3, a detail elevational View; Fig. 4, a plan of the head of the machine, while Figs. 5 and 6 are detail views of the mandrel; Figs. 7 and 8, views showing the guide for the paper strips; Fig. 9, is a detail plan view of the supporting rollers for the tube covered mandrel and the adjacent parts; Fig. 10, an ele vational view of the same; Fig. 11, an end elevational View of the rollers detached; Fig. 12, is an end elevation of the automatic saw cut off mechanism, viewed from the cutting end of the machine; Fig. 13, a similar view taken on the line 1313 of Fig. 16, when seen from the opposite or driving end of the machine; Fig. 14, a sectional detail view of the saw mechanism taken on the line 14-14 of Fig. 16, showing the operating cams; Fig. 15, is a sectional view of the driving pulley of the saw; Fig. 16, a side elevation of the said saw cutting off mech- Specification of Letters Patent.

Original application filed June 28, 1909, Serial No. 504,915.

Patented Oct. 17, 1911. Divided and this application filed March 29,

Serial No. 552,241.

anism when viewed from the tube side of the machine; Fig. 17, a like view when seen from the side of the machine opposite the tube; Fig. 18, a detail of one of the belt pulleys showing an extension of the pulley bracket.

1., represents the base of the machine which may be similar to a lathe bed, and is preferably supported by the legs 2. On this bed are pivoted the bed pieces 3, and the swinging arm 4; the pivots 5, of the bed pieces, see Fig. 2, and the pivot 6 of the arm being in line with each other all as heretofore. To one end of each of the bed pieces is secured the usual slidable supports 7, which are provided with the improved upright member 8, having the horizontally projecting members 9 and 10, between which are located the pulleys 11, for the belts 12, and through which pass the shafts 13 for said pulleys, as shown. The distance between each pair of pulleys 11, that are located on the same bed plate may be adjusted by means of the screw 15, in the custo-mary manner. At one end of the bed plate is the journal bracket 16, of the shaft 17, see Figs. 2 and 18, which bracket is pivoted on the bolt 18, passing through the parts 3 and 16, as shown.

The shaft 17 carries the bevel gears 18 which mesh with the bevel gears 19 on the lower ends of the pulley shafts 13, as illustrated; it is pivotally connected at 20, to the swinging arm 4, see Fig. 1, and carries at its extreme end the power pulley 21, all as is well known in this type of machine. 22 likewise represents the well known means for adjusting the angular relation of the bed plates 3, and therefore that of the belts 12, to the mandrel 23; and 24 represents the well known heating pipes for the interior of said mandrel.

It is well known in machines of this class, that the paper or other strips 25 suitably prepared are fed to the mandrel 23, are gripped by the belts 12 and formed into tubes which must be forced out by the action of the belt-s over the unsupported end of the mandrel, where they are automatically cut off into suitable predetermined lengths. In making very small tubes, however, correspondingly small mandrels are employed, and if these mandrels, as well as others, are not suitably supported near the points at which the belts exert their pressure they are apt to sag and give trouble. In order to overcome this defect, the head 26, in which the mandrel is secured is cut away at 27, in order that the strip 25 may pass thereover, no matter what its inclination to the mandrel may be, and thereby permit the belts 12, to grip the tube covered mandrel at a point much closer to said supporting head than has been possible heretofore. This greatly lessens the liability of said mandrel to sag under the pressure of the first pair of belts. The mandrel is preferably clamped in said head by the tightening bolts 28, passing through the lugs 30 that draw together the sides of said head which are separated by the slit 29, shown in dotted lines in Figs. 3' and 4.

In order to prevent the mandrel from sagging at the outer, unsupported end, under the pressure of the second pair of belt-s there is provided the adjustable supporting rollers .31 and 32, see Figs. 9, 10 and 11, which bear from above and below against one side of the tube covered mandrel, as the tube is forced past said rollers and therefore the pressure of the belts, to a great extent, is taken by said rollers. In order to adapt these rollers to mandrels of different sizes they are supported by a slotted piece 34; and the upper roller 31 is made adjustable to and from the lower roller 32, by mounting it on the bracket 36, which is adjustable on the said support 34, as shown. The support 34, itself is carried by the stem 37, which is adjustable up and down in a socket 38 which socket is provided with the slotted foot 39, itself longitudinally adjustable on the boss 40, rigid with the saw frame arm 41. By means of the several adjustments described, it is evident that the supporting and steadying rollers 31 and 32 may be adjusted to mandrels of any size and of any degree of flexure.

After the mandrel has been properly supported to prevent fleXure, as above described, it is desirable to provide means by which the paper tube may, especially if it is to be formed from thin paper, be made slightly larger than the mandrel, so it will easily slip off the same. To these ends there is provided on the mandrel, as shown in Figs. 5 and 6, an enlarging plate 43, preferably consisting of a thin piece of steel or other material, suitably secured to the mandrel, and extending longitudinally thereof a distance beyond the spiral guide 44, of about one and one-half times the width of the paper strips to be wound thereover. The edges of this plate are filed down to a taper in order to avoid anyshoulders, and one end abuts the spiral guide 44 which is formed of a strip of suitable material, preferably steel, wound around the mandrel, suitably secured thereto and having a pitch equal to that which the paper strips are to have in the finished tube and a length sufficient to cause its ends to slightly overlap. The ed e of the paper strips 25 constantly abuts this spiral in the well known manner, and it therefore constitutes a continuous guide for the same. The strips 25 are further guided in their passage to the mandrel by the adjustable guides 45, each consisting of an adjustable base 46, provided with the slot 47, and the socket 48, into which fits the stem 49, to which is attached the flanged guide member 50 adj ustably associated with the complementary member 51, and each of which members is or may be provided with a turned over guide tip 52, beneath which the paper strip passes, as shown. The structure and adjustments of these guides are such as to insure the certain and easy passage of the strips to their proper positions on the mandrel, no matter what their size may be.

It is very desirable in machines of this type to be able to adjust the saw frame while the machine is in operation, and thereby insure the proper working of the saw by bringing the saw support nearer to or farther away from the tubes to be cut; and also to enable the saw when it is operated by the mechanism disclosed below to out such tubes at varying angles. To these ends in Figs. 9 and 10, there is illustrated a saw frame 54, mounted on the flange 55 of the arm 41, which arm is attached to the bed 1, of the machine, by suitable means. as a plate 56 and bolts 57.

Passing through the upper end of the arm 41 through a lug 64, on the flange 55, is an adjusting screw 58, controlled by the wheel 59, which is adapted to adjust said saw frame transversely of the machine. And passing through the flange 60 of the frame 54, and abutting the said flange 55, are the adjusting screws 61, which serve to so adjust said saw frame as to make different angles with the axis of the machine. In order to hold said frame 54 in sliding relation with the flange 55, clips 63 are provided therefor, as shown. It is evident that each of the above adjustments of the frame, as well as of the saw itself caused thereby, may be had while the machine is in operation.

The saw cutting off mechanism, by which the saw is automatically brought into contact with the tube 76, is best illustrated in Figs. 12 to 17, and comprises the two arms 66 attached to or integral with the frame, or table 54; and through these arms passes the rod 68 and between the same is pivoted on said rod the frame 67, as plainly shown in Figs. 16 and 17. In the upper part of the frame 67 is journaled the arbor 69 which is slidable in its bearings and which carries the saw 77, for automatically cutting off predetermined lengths of tubing 76, as fast as it is formed. Projecting from one side of the frame 67, are the arms and 71, see Figs. 14 and 17, adapted to be struck by the cams 72 and 73, respectively, mounted on the shaft 74, passing through the upper extremities of the arms 66, all as will be more fully disclosed below.

Referring again to Figs. 16 and 17, it will be observed that the shaft 68, also carries an arm 79 near its outer end, that the sliding arbor 69 on which the saw is mounted carries a short arm 80, which is adapted to slide on rod 69 fixed to the frame, and passing through the said arms 79 and 80 is a rod 81, carrying the plate, or projection 82, against which the tube 76 strikes as it is forced toward the left, as seen in Fig. 16, by the belts 12 of the machine. Collars 83 and 83 are secured to the rod 81 by set screws on each side of the arm 80, and projecting from the collar 83, is the short arm or stud 84, as best seen in Figs. 13 and 14, for a purpose to be presently stated. It follows from the construction so far described, that when the tube 76 strikes the projection 82, it will push the rod 81 longitudinally of the machine, and cause the same to carry with it the arm 80, and the arbor 69, to which it is attached; whereupon the saw attached to said arbor will move longitudinally of the machine in the manner well known in this art. The said saw arbor 69, is driven by a belt from any suitable source, passing over the pulley 85, on the sleeve 86, see Fig. 15, journaled in a bearing of the frame 67. A feather 88 in a slot in the arbor 69 forms a sliding driving connection between said pulley and said arbor.

Mounted on the end of the shaft 74 car rying the cams 72 and 73 is the clutch pulley 86, having a well known friction connecticn with said shaft and receiving power from any suitable source, such as the pulley 120, driven by the shaft 17; and also mounted on this shaft 74 are the two collars 87 and 88 carrying the pins 89 and 90 respectively, located 180 apart, and adapted to engage the pivoted dogs 91 and 92 respectively, as the shaft revolves. These dogs are held in the path of said pins by means of the spring 95, as shown. Secured to the shaft 81, and sliding on the shaft 69, is also a projection 96, carrying a beveled dog or finger 97, adapted to strike the upper end of said dog 91 and turn it on its pivot when the saw is carried to the right, as seen in Fig. 17; but adapted to yield and pass by the beveled upper end of said dog when the saw is moved in the opposite direction. Extending from said projection 96, is also a rod 98, carrying an adjustable toe 99 adapted to strike the upper end of the dog 92, and likewise turn it on its pivot as the saw continues to move 1n the same dlrection,

all as is well known. It is evident that the action of this part of the mechanism so far as now described will be as,follows:

Power being continuously applied to the friction clutch pulley 86, suppose the tube 76 causes the saw to move in the direction of the arrow in Fig. 17, the dog 91, will re lease the pin 89, the shaft 74 will make a half revolution, and be stopped by the pin 90 coming in contact with the dog 92. lVhen this happens the cam 72 carried by said shaft strikes the arm or projection 70 on the frame 67 forcibly turns said frame on its pivot 68, and throws the saw in contact with the said tube 7 6, while it is still traveling with the tube, in the direction of the arrow.

Power being continuously applied to the pulley 85, the saw is continuously rotated, and therefore the tube is severed while this longitudinal motion of the saw continues. The parts are so timed by adjusting the toe 99, that when the severance of the tube is completed the said toe strikes the dog 92, releasing the pin 90, and permitting the other cam 73 carried by the shaft 74, to restore the frame to the position shown in Fig. 14, by its contact with the arm 71, whereupon the saw will be automatically moved back longitudinally of the machine to its former position by the mechanism now to be described.

Referring to Figs. 1 and 18, it will be ob served that one of the pulley shafts is provided with an extension 100, on which is mounted an arm 101, carrying at its end an adjustable connection 102, with the spring 103, secured to the arm 80, movable with the saw. Therefore, when the saw is moved in one direction by the tube 76, this spring is extended, and when the saw is released from the tube, by the cam 73, said spring immediately returns said saw to its initial position, ready to be again moved against the tension of said spring when the tube grows to a sufficient length.

It sometimes happens in machines of this type, especially when thetube reaches the saw in a soft condition, owing to the quantity of glue employed, or to other causes, that the saw fails to cut the tube properly, and the section of the tube out off, also sometimes gets ammed between the plate 82 and the saw, or between said plate and the end of the advancing tube, whereupon the cut off section of tubing fails to fall at the proper time and clear said plate for the next operation. To avoid these defects, and to render the action of the whole cutting off mechanism more perfect, there is provided a strong torsional spring 104, to insure the quick and early movement of the saw back and away from the tube. This spring supplements the action of the cam 73, which must of necessity be somewhat slow in its earlier stages in order to avoid shock. There is also provided the following means for positively swinging the plate 82 away from the end of the tube; secured to the top of the frame 67 is the cam plate 105 on which the toe or arm 84 reciprocates. As above stated, this toe is made fast to the shaft 81 by the collar 83, and therefore when it rides up the cam, it causes said shaft to rotate on its axis, and said plate 82 to swing out of the way of the end of the tube. In addition to this, there is provided the rod 108, secured to the frame 54, carrying the upright 109, slotted at 110, to which is adjustably secured at 112, a transverse slotted piece,

provided with the right angled extensions 113 and 114, which straddle the tube, as best shown in Fig. 12. As the saw moves from its dotted'line to its full line position, shown in said figure, the extensions 113 and 114, prevent the tube from following, and thereby serve as strippers.

A belt tightener 115 is mounted on the frame 66, see Fig. 13, and is controlled by the spring 116, made fast to the main end of the machine, as shown at 117.

It is obvious that those skilled in the art may vary the arrangement of parts without departing from the spirit of my invention and therefore I do not wish to be limited to the construction shown except as may be required by the claims.

What I claim is 1. In a machine for making spirally wound tubes and automatically cutting them off into suitable lengths, the combination of a base; a mandrel on which said tubes are formed supported from said base; a flanged arm 41 supported from said base; a frame 54 mounted on the flange of said arm; a tube cutting ofl mechanism carried by said frame 54; an adjusting screw 58 for said frame; and means attaching said frame to the flange of said arm, substantially as described.

2. In a machine for making spirally wound tubes and automatically cutting them off into suitable lengths, the combination of a base; a mandrel on which said tubes are formed supported from said base; a flanged arm 41 supported from said base; a flanged frame 54 mounted on the flange of said arm adapted to carry a tube cutting off mechanism; an adjusting screw 58 for said frame; and means comprising clips 63 and screws 61, attaching said frame to the flange of said arm, substantially as described.

3. In a machine for making spirally wound tubes and automatically cutting them off into suitable lengths, the combination of a base; a mandrel on which said tubes are formed supported from said base; belts for forming and feeding the tubes passing around said mandrel; a flanged arm 41 supported from said base; a flanged frame 54 mounted on the flange of said arm; a pair of arms 66 rigid with said frame; a rod 68 passing through said arms 66; a frame 67 mounted on said rod 68 between said arms 66; an arbor 69 passing through said frame 67 a saw 77 mounted on said arbor; and means whereby said frame 54 may be adjusted on the flange of said arm 41 both longitudinally and transversely of the tube formed on said mandrel, substantially as described.

4. In a machine for making spirally wound tubes and automatically cutting them off into suitable lengths, the combination of a mandrel on which said tubes are formed; means for feeding said tubes longitudinally of the mandrel comprising belts passing over pulleys; shafts on which said pulleys are mounted; one of said shafts having an extension 100; a lever mounted on said extension; a saw for cutting ofl said tubes; means for rotating said saw; means for swinging said saw toward and away from said tube at intervals; means for causing said saw to travel with the tube while severing the same; a spring for moving said saw longitudinally of the tube after the severing action is completed; and an adjustable connection between said spring and said lever, substantially as described.

5. In a machine for making spirally wound tubes and automatically cutting off the same into suitable lengths, the combination of a mandrel on which the tubes are formed; belts passing around said mandrel for forming and feeding said tubes; a saw for severing the tubes; a sliding frame on which said saw is mounted; and means comprising cams for automatically forcing the saw toward and from the tube; and a torsional spring 104 for insuring the early movement of the saw away from the tube, substantially as described.

6. In a machine for making spirally vound tubes and automatically cutting off the same into suit-able lengths, the combination of a mandrel on which the tubes are formed; belts for forming and feeding said tubes; a saw for severing the same; means comprising cams for automatically forcing the saw toward and from the tube; means permitting the saw to move longitudinally of the tube during the severing operation; a spring adapted to return the saw to its original position after the tube is severed, and a torsional spring 104 for insuring the early movement of the saw away from the tube, substantially as described.

7. In a machine for making spirally wound tubes and automatically cutting off the same into suitable lengths, the combination of a mandrel on which the tubes are formed; belts for forming said tubes; a saw ward and from the tube; a plate 82 connected with the saw and against which the tube is adapted to strike, and to thereby move the saw with the tube during the severing operation; and means to swing said plate out of line with the tube after the said tube is severed, substantially as described.

8. In a machine for making spirally wound tubes, the combination of a mandrel and a belt for forming the tube; means for severing the tube after it is made and while supported by said mandrel; means for holding the tube while it is being severed, comprising a plate 82, in line with said tube; and means for automatically and positively moving said plate out of line with said tube after the same is severed substantially as described.

9. In a machine for making spirally wound tubes, the combination of a mandrel and a belt for forming the tube; means for severing the tube; means for holding the tube while being severed, comprising a swinging plate 82; an arm controlling the swinging motion of said plate; and a cam over which said arm travels, substantially as described.

10. In a machine for making spirally wound tubes, the combination of a mandrel and belts for forming and feeding the tube; a saw for severing the tube; means connected with said saw, causing the same to move with the tube in one direction, means for holding the tube while being severed and comprising a swinging plate 82; an arm controlling the swinging motion of said plate; a cam over which said arm travels;

and a spring for moving the saw in an oppo-- site direction after the severing operation is completed, substantially as described.

11. In a machine for making spirally wound tubes, the combination of a mandrel and belts for forming and feeding the tube; a swinging plate 82, against which said tubes are adapted to contact, to move said plate; a saw for severing said tubes; a sliding connection between said saw and plate causing said saw to move with said plate with said tubes during the severing operation; an arm and cam adapt-ed to positively swing said plate out of line with said tubes after the same are severed; means for moving said saw toward and away from said tubes; and a spring to return said saw to its original position, substantially as described.

12. In a machine for making spirally wound tubes, the combination of a mandrel, on which said tubes are formed; belts passing around said mandrel; a swinging plate 82, against which said tubes are adapted to contact, to move said plate; a saw for severing said tubes; a sliding connection be tween said saw and plate causing said saw to move with said plate with said tubes during the severing operation; and an arm and cam adapted to positively swing said plate out of line with said tubes after the same are severed means for moving said saw toward and away from said tubes, a spring to return said saw to its original position; and an additional spring to insure the early disengagement of said saw from said tubes, substantially as described.

13. I11 a machine for making a spirally wound tube, the combination of a mandrel on which the tube is made; a sliding plate 82 against which the tube contacts while being made; a piece 111 provided with eX- tensions adapted to straddle the tube; a saw for severing the tube connected to and moving with said plate 82; and means for rotating said plate after said saw completes its severing operation, and permitting said eX- tensions to strip the severed tube from said plate, substantially as described.

14. In a machine for making a spirally wound tube, the combination of a mandrel on which the tube is made; asliding plate 82 against which the tube contacts while being made; an adjustable piece 111 provided with extensions adapted to straddle the tube; a saw for severing the tube connected to and moving with said plate 82; means for moving said saw toward and away from said tube; a spring for insuring the early disengagement of said saw from said tube after the latter is severed; and means for rotating said plate after said saw completes its severing operation, and permitting said extensions to strip the severed tube from said plate, substantially as described.

15. In a machine for making spirally wound tubes, the combination of a saw for severing the same; rotating cams for moving the saw toward and from the tube; dogs to control the cams; and a single spring controlling both of said dogs, substantially as described.

16. In a machine for making aspirally wound tube provided with a bed, the combination of a saw for severing the tube; a frame 54 supported from said bed, and on which the saw is mounted; a pulley 86 for driving the saw; a belt passing over the pulley; a belt tightener 115 mounted on said frame; and a spring 116 connected between said bed and belt tightener for controlling the latter, substantially as described.

In testimony whereof, I aflix my signature, in presence of two witnesses.

FRANCIS C. OSBORN.

Witnesses:

FRANK F. EDWARDS, J OSEPH T. HOUGHTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

